Mr Kurz became Europe’s youngest foreign minister at the age of 27 and now appears certain to become the youngest leader in the world at just 31-years-old.

His party is tough on migration, easy on taxes and widely Eurosceptic after rebranding itself over the last few months to propel its popularity in the wealthy Alpine nation.

He is expected to form a coalition with the right-wing populist Freedom party (FPO), who got 26.8 per cent of the vote, according to the latest projections.

Speaking to supporters at a rally, Mr Kurz said: “I can promise you today that I will fight for change in this country with all my power.

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“I accept this responsibility with great humility.”

Mr Kurz claims he has been politically active since the age of 10 and his declaration of election victory is the latest triumph in his meteoritic rise in Austrian politics.

But who are the other youngest leaders in the world?

REUTERS

Sebastian Kurz has soared to the top of Austrian politics

Enrico Carattoni, Captain Regent of San Marino

Mr Carattoni, 32, is one of the two current leaders of San Marino, the tiny micro state surrounded by Italy.

The tiny country is home to just 34,000 people and elects two heads of state every six months, with Mr Carattoni and Mr Fiorini elected on October 1.

Mr Kurz’s election victory means Mr Carattoni’s tenure as the world’s youngest leader has lasted less than three weeks.

REUTERS

With all the missile threats it’s easy to forget that Kim Jong-un is only 34 years old

Kim Jong-un, Supreme Leader of North Korea

Warmongering Kim Jong-un became North Korean leader on December 30, 2011, after the death of his father – when he was just 28-year-old.

There were believed to be concerns among North Korean generals that Jong-un was too inexperienced to take power, but he became leader within two weeks of his fathers death.

In recent years, the barbaric leader has ramped up his threats to the rest of the world and continued to develop North Korea’s nuclear and missile programmes.

Now 34, Kim Jong-un is married to Ri Sol-ju and the couple are believed to have several children.

Kim Jong-un takes a break from firing missiles to visit a fruit farm

Thu, September 21, 2017

In the South Hwanghae Province in North Korea, Kim Jong-un gives field guidance during a visit to a fruit orchard

AFP/Getty Images

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Kim Jong-un seems impressed with his visit to North Korea’s fruit farm

GETTY

Tamim bin Hamad Al Thani, the Emir of Qatar

Tamim bin Hamad Al Thani, Emir of Qatar

Sheikh Tamim became one of the youngest leaders in Qatar’s history when he took power in 2013 at the age of 33 after his father abdicated the throne.

Now 37, Sheikh Tamim became the first ruler, in a succession of three Qatari rulers from the Al Thani family, to ascend to power without resorting to a coup.

He was educated in the UK, attending Sherborne School, Harrow School and the Royal Military Academy Sandhurst. He has three wives and ten children.

Sheikh Tamim has come under increasing pressure after several Arab nations cut ties with Qatar earlier this year, accusing the country of “harbouring a multitude of terrorist and sectarian groups that aim to create instability in the region” – a claim Qatar denies.

GETTY

Jigme Khesar Namgyel Wangchuck, the King of Bhutan, was crowned in 2008

Jigme Khesar Namgyel Wangchuck, King of Bhutan

Jigme Khesar Namgyel Wangchuck became King of Bhutan on December 9, 2006, after his father abdicated the throne. He was officially crowned almost two years later in a ceremony celebrating a century of monarchy in Bhutan.

Khesar is a keen supporter of democracy and began his reign by overseeing parliament sessions where electoral laws, land reform and other important issues were deliberated.

The Bhutanese king is now 37 and is married with one son.

GETTY

Leo Varadkar, pictured with Theresa May, became Ireland’s youngest ever Taoiseach this year

Leo Varadkar, Taoiseach of Ireland

After being elected leader of Fine Gael in June this year, Leo Varadkar became the youngest Taoiseach in Ireland’s history at just 38-years-old.

Mr Varadkar was the youngest EU leader until Mr Kurz’s victory and is Ireland’s first openly gay Taoiseach and the first of half-Indian descent.

Ireland has had younger leaders than Mr Varadkar however, namely Eamon de Valera (aged 36) and Michael Collins (aged 31) – but this was before the title Taoiseach was adopted.